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公开(公告)号：KR101175565B1
公开(公告)日：2012-08-21
申请号：KR1020100100517
申请日：2010-10-14
Applicant: 국방과학연구소
Abstract: 포탄용파편및 그제조방법을개시한다. 본발명의일 실시예에따른포탄용파편은 24개의꼭짓점과 36개의모서리를갖는 14면체형상의몸체또는 32개의꼭짓점과 48개의모서리를갖는 18면체형상의몸체를갖는다. 따라서육면체의코너또는모서리가절단된형상에대응되는다각형의몸체를구비하여정육면체파편에대비하여 3배수이상의꼭짓점과모서리를가짐으로써볼형파편보다우수한관통성과낮은도탄발생률을가지고, 볼형파편과동일한무게에너비는볼형파편의직경보다작음으로인하여볼형파편및 정육면체파편보다낮은공기저항성을가져서비산속도가더 우수하며, 볼형파편또는정육면체파편과비교하여동일부피의포탄(파편조립체)을형성할경우파편밀도가증대되어포탄성능을향상시킬수 있다.
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公开(公告)号：KR100674216B1
公开(公告)日：2007-01-25
申请号：KR1020060055793
申请日：2006-06-21
CPC classification number: F42B1/032
Abstract: A tungsten-copper alloy part manufacturing method which minimizes residual pores existing in the alloy, obtains a very homogeneous structure of tungsten and copper, and improves thermal conductivity, ductility, tensile strength and fatigue strength by applying a tungsten-copper composite powder coated with fine tungsten particles to a powder injection process, thereby manufacturing a tungsten-copper alloy, and a heat sink, an electrode for discharge, an electric contact, and a liner for shaped charge warhead manufactured by the same are provided. A manufacturing method of a tungsten-copper alloy part comprises the steps of: milling a mixture of tungsten oxide(WO3 or WO2.9) powder and copper oxide(CuO or Cu2O) powder, holding the milled powder mixture in a temperature range of 200 to 400 deg.C under a reductive atmosphere for 1 minute to 5 hours, increasing temperature of the powder mixture again and holding the powder mixture in a temperature range of 500 to 700 deg.C for 1 minute to 5 hours, and increasing temperature of the powder mixture again and subjecting the powder mixture to reduction heat treatment in a temperature range of 750 to 1080 deg.C for 1 minute to 5 hours to prepare a tungsten-copper composite powder with a structure in which tungsten covers copper powder; mixing 30 to 70 vol.% of a binder with the prepared tungsten-copper composite powder as a raw material to manufacture an injection moldable mixture; injection molding the mixture into a molded body by a mold with a desired shape such as a heat sink or a liner for shaped charge warhead; dissolving the binder mixed with the injection molded body using a solvent and heating the dissolved binder to burn the binder, or directly heating the injection molded body to remove the binder mixed with the molded body; sintering the binder removed molded body at 1100 to 1400 deg.C in a hydrogen atmosphere or a hydrogen-containing reductive atmosphere to densify the density of a sintered body as much as 95% or more as compared with a theoretic density; and hot isostatic pressing the densified sintered body at 500 to 1400 deg.C and 5 to 200 MPa for 1 minute to 10 hours to remove pores in the sintered body.
Abstract translation: 一种使合金中存在的残余孔最小化的钨铜合金部件制造方法，通过涂覆精细的钨铜复合粉末，获得钨和铜的非常均匀的结构，并且提高导热性，延展性，拉伸强度和疲劳强度 钨粉末进行粉末喷射处理，从而制造钨铜合金，以及散热器，放电用电极，电接点和由其制造的成形电荷弹头的衬垫。 钨铜合金部件的制造方法包括以下步骤：研磨氧化钨（WO3或WO2.9）粉末和氧化铜（CuO或Cu2O）粉末的混合物，将研磨的粉末混合物保持在200℃的温度范围内 在400℃下还原气氛1分钟至5小时，再次升高粉末混合物的温度，并将粉末混合物在500-700℃的温度范围内保持1分钟至5小时， 再次将粉末混合物在750〜1080℃的温度范围内进行还原热处理1分钟〜5小时，制备钨覆铜粉结构的钨铜复合粉末; 以制备的钨 - 铜复合粉末为原料，混合30〜70体积％的粘合剂，制造注塑成型混合物; 通过具有所需形状的模具将混合物注塑成型体，例如散热器或成形充电弹头的衬垫; 使用溶剂溶解与注射成型体混合的粘合剂，加热溶解的粘合剂以烧结粘合剂，或直接加热注射成型体以除去与成型体混合的粘合剂; 在氢气氛或含氢还原气氛中，在1100〜1400℃下烧结粘合剂除去成型体，使烧结体的密度与理论密度相比高达95％以上。 并在500〜1400℃，5〜200MPa下将致密化的烧结体热等静压1分钟〜10小时，除去烧结体中的孔。
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公开(公告)号：KR101488703B1
公开(公告)日：2015-02-04
申请号：KR1020140148510
申请日：2014-10-29
Applicant: 국방과학연구소
Abstract: 본 발명은, 탄탈륨의 이론 밀도 대비 99% 이상의 상대밀도를 나타내고, 라이너의 전체 영역에서 평균 30㎛ 이하의 결정립도를 가지며, 200ppm 이하의 산소 농도를 가지고, 랜덤 배향의 결정 방위를 갖는 것을 특징으로 하는 탄탈륨 분말 소결체 라이너를 제공한다. 또한, 본 발명은, 탄탈륨 분말을 냉간 등압 성형하여 분말 성형체를 형성하는 단계; 및 형성된 분말 성형체를 열간 등압 성형하는 단계를 포함하는 탄탈륨 분말 소결체 라이너의 제조방법을 제공한다.
Abstract translation: 本发明提供一种钽粉烧结衬套，其与钽的理论密度相比具有至少99％的相对密度，其平均在衬套的整个区域中的晶粒密度平均为30μm以上，具有 小于等于200ppm的氧含量，并且具有随机取向的结晶取向。 另外，提供一种钽粉烧结衬垫的制造方法，其特征在于，包括以下步骤：在冷等静压工序中形成钽粉末，形成粉末成型体; 并在热等静压工艺中成型成形的粉末成型体。
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公开(公告)号：KR1020120038837A
公开(公告)日：2012-04-24
申请号：KR1020100100517
申请日：2010-10-14
Applicant: 국방과학연구소
Abstract: PURPOSE: A fragment for a cannon ball and a manufacturing method thereof are provided to ensure low air resistance and rapid scattering speed since the width of a fragment is smaller than the diameter of a ball-type fragment. CONSTITUTION: A fragment(100) for a cannon ball comprises a 14-surface body(110). The body comprises 24 apexes(121,131) and 36 edges(123,133). 8 corners of the reguarl hexahedron of the body are cut to 33-37% depth from the edge toward the center of the regular hexahedron from the apex of the corner to remove triangular pyramid-shaped sections.
Abstract translation: 目的：提供一种用于炮弹的碎片及其制造方法，以确保低碎片的宽度小于球形碎片直径的低空气阻力和快速散射速度。 构成：用于炮弹的碎片（100）包括14个表面体（110）。 身体包括24个顶点（121,131）和36个边缘（123,133）。 身体的六角六面体的8个角被从角的顶点从边缘朝向正六面体的中心切割成33-37％的深度，以去除三角锥形截面。
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